Added 'Timestamp' column to inbox table.
Updates to ingest message (inbox) infrastructure that adds a 'New?' column
to the table with a check box. All messages in the inbox have their check
marks removed when the inbox is closed.  Messages that come in to the inbox
there after will have a check in this column.
Refactored TableCellRenerer to have several classes with a single 'point-of
-entry' (MessageTableRenderer) to dispatch to other TableCellRenderers
based on things such as column data type. Changed date display to display
only on the time without the date.
Added code to propagate changes to MessageTableModel to the
IngestMessagePanel which then propagates this change to listeners
via its PropertyChangeSupport member.  There is one problem: at
the end of the RecentActivity ingest the message inbox icon shows
two new messages when there should be only one.
Merge branch 'master' of https://github.com/sleuthkit/autopsy
Fixed bug causing the number of new messages displayed by the
ingest inbox icon to be wrong.
Merge branch 'master' of https://github.com/sleuthkit/autopsy
Fixed issue that was giving the wrong color to rows in the ingest
message box. Changed height and width of inges message box window.
Merge pull request #172 from tmciver-basis/master

Ingest message box changes for Jira AUT-713